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SAMUEL H. BLOSS'OM, OF BUFFALO, NEW YORKQAND vJ'MES E. HUSTON, 0F HILLSDALE, MICHIGAN.

Letters Patent No. 66,783, dated July 1,6, 1867.

IMrRovBMENT vuv rLouaBoLTs.

TO ALL WHOM IT MAY CONCERN.: I

i Be it known that we, SAMUEL H. BLOSSOM, of Buffalo, in the county of Erie, and State of New York, and JAMES E. IIUSTON, of the city and county of Hillsdale, and State of Michigan, have invented a new and improved Bolt for the Separation ot' Middlings; and we do hereby declare the following to be a full, clear, and exact description of the same, sulicientfto 'enable .one skilled Vin the art to which the invention vappertains to make use of it, reference being had to the accompanying drawings, forming part of thisy specification, and in 'which- Figure 1 is a longitudinal vertical section on the line v x, g. 2.

Figure 2 is a transverse vertical section on the line y y, g. 1, looking in the direction of the arrow y.

Figure 3 is a transverse vertical section on the line z z, iig. l, looking in the direction of the arrow z', the division-wall T being removed. l v I This machine consists-oi` two consecutive bolts, of which the rst receives the meal from the stones and removes from it the coarse o'al, which is called feed, and the second separates the middlings and unground particles from the fiour. The cloth of the iirst bolt has meshes which retain only the finished feed, and the meshes' of the second bolt only permit the fine flour tcpass. At the head of each bolt is a double diaphragm to prevent the eddying specks in the chamber at the head of the vbolt from being 'drawn ineamong the material which passes through the bol'ting-cloth. l

In the drawings, is the frame, which is divided by the horizontal partition B into two chambers, the upper occupied by the bolt C andthe conveyerD, and the lowerl chamber occupied by vthe second bolt E and the conveyer F. The bolts are attached to shafts G H respectively, which 'are driven by the train of gearing I outside the chambers, but supported in the frame. The conveyers D F are also driven by the same train of wheels. The upper bolt is'covered with cloth of such comparative coarseness that it only retains the grade ol` oifal known as feed. It receives the meal from the stones at the hopper-spout. J, which delivers it inside the bolt by the bent end which reaches within the rim e. The meal thus discharged into the interior of the bolt gradually nds its way to the foot ofthe bolt, as the' axis is somewhat inclined7 the whole of it passing through the coarse meshes except the feed, which is eventually passed out at' the foot of the bolt and dischargedat the spout KV, figs. 1 and 2. The' material which has passed through the cloth of the rst bolt is conveyed by the screw D t'o the spout L, which 'carries it to the head of bolt E and discharges it within` the rim e. The bolt E has fine bolting-cloth stretched upon its'ribs, and only permits the passage of the fine flour, While the mifddlings and unground particles of grain are retained within the bolt until they are discharged at the footat the spout M to' be carried again to the stonesf The flour which has passed through the meshes of thesecond bolt is conveyed by the screw F to the discharge-spout N. It is common to t the head of the bolt in a diaphragm or partition, R, which is pierced with a `hole'corresponding to the size of the bolt, the peripheryof which its in the opening through the said partition R, the object of which is to keep back specks which may be circulating in the chambery at the head of the bolt. Many attempts have been made to it the bolt at this point so as not to permit thepassage of anything from the chamber p to mix with the matter which has passed through the bolting-cloth, but without perfectly attaining the end desired. We have introduced a second diaphragm, P, which is placed parallel to the other at a short distancefrom it, and forms a secondary chamber, p, which catches any specks that may pass through the crack around the perimeter of the bolt and the edge of the diaphragm R. The matter collected incliamberspp is collected and discharged by a spout separately from the other results of the operation. A similar arrangement at the head of the lower bolt .is provided-with alike purpose and result, and the matter discharged at the spout S separately from other matter to be returned to first bolt G. v

We are aware that two consecutive'bolts have been used throughwhich the meal is passed.` In some cases the bolts are both covered with ne cloth, so as, by the successive action, to obtain the supcrine flour. Inother cases the first bolt'separates 'the ne flour, and a second, coarser bolt, sorts the oial, but by neither of these arrangements can -the object be attained which we desire to secure. Our object is to Aseparate from the meal that portion which will give a profitable result by re-grinding; aud after many experiments lwe have succeeded Vthis 20th day of February, 1867.

in accomplishing it by the means we have described: passingl the meal through a first coarse bolt, which allows everything to pass except coarsest oifai, called feed, and a. second boit covered with fine cloth, which only allows the fine Hour to pass, and delivers the middlings, with the imperfeetly ground particles, at another spout,

from whence it passes to the stones to be 1re-ground.

Having described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. The bolts C and E, constructed, arranged, and operating as described, to separate the feed from the meal and the our from the middlings consecutively.

v2, The secondary chamberp employed in combination with the chamber p', as and for the purposes set forth.

To the above specification of our improved bolt for the separation of middlings We have signed our hands S. H. BLOSSOM, J. E. HUSTON.

Witnesses:

SoLoN C. KEMoN, CEAS. A. PETTIT. 

